<!DOCTYPE html>
<html>
<head>
  <meta charset="UTF-8">
  <title>Example10</title>
  <style>
    .nav {
      background-color: antiquewhite;
      width: 500px;
      height: 30px;
      margin: 20px auto;
    }
    .item {
      width: 125px;
      float: left;
      line-height: 30px;
      text-align: center;
    }
    #hide {
      visibility: hidden;
    }
  </style>
</head>
<body>
  <div class="nav">
    <div class="item">首页</div>
    <div class="item">个人主页</div>
    <div class="item">设置</div>
    <div class="item" id="hide">隐藏内容</div>
  </div>
  <script>
    var hideText = document.getElementById('hide');
    // 通过textContent属性返回获取到的元素的内容
    console.log(hideText.textContent);
    // 通过innerText属性返回获取到的元素的内容
    console.log(hideText.innerText);
    // 通过textContent属性设置获取到的元素的内容
    hideText.textContent = '特定时刻显示';
    // 通过textContent属性返回元素修改过的内容
    console.log(hideText.textContent);
  </script>
</body>
</html>